ANAHEIM, Calif. (AP) - Turning up the heat in his ongoing battle with public employee unions, Gov. Arnold Schwarzenegger officially endorsed a ballot measure Saturday that would require those unions to seek written permission from members before using dues money for political purposes. Democrats, the principal beneficiaries of labor union contributions, have viewed the measure as a virtual declaration of war on their political power in the state. Addressing an enthusiastic luncheon crowd at the state Republican Party convention, Schwarzenegger announced his support for the measure dubbed "Paycheck Protection," which will appear on the ballot as Proposition 75. The initiative...